In April, Harrold competed at the 2010 European Women's Artistic Gymnastics Championships in Birmingham, United Kingdom.

[8] In May, Harrold competed at the 2012 European Women's Artistic Gymnastics Championships in Brussels, Belgium as a replacement for her injured teammate Imogen Cairns.

[12] At the 2013 European Artistic Gymnastics Championships in Moscow Harrold qualified to the individual all-around, uneven bars, and balance beam finals.

[25] She scored 14.683 on vault, 14.400 on the uneven bars, 13.066 on the balance beam and 13.466 on the floor exercise to finish with a total of 55.615, just behind teammate Claudia Fragapane in 10th place.

[28][29] In January, it was confirmed that Harrold would compete at the 2015 AT&T American Cup, her first appearance at the competition, alongside compatriot Claudia Fragapane.

However, as of 20 January, due to a minor injury, Harrold pulled out of the American Cup and was replaced by Natsumi Sasada of Japan.

[30][31] Harrold returned to competition at the British Team Championships where she helped The academy finish in third place[32] contributing a score of 14.000 on the vault, 13.850 on the balance beam and 12.500 on the floor exercise.

[33] Later in that month, Harrold competed with Rebecca Tunney at the World Challenge Cup in Osijek, Croatia.

She won a gold medal in the uneven bars final with a score of 14.125, 0.850 clear from silver medalist Annika Urvikko.

On 22 August 2016 Harold announced her retirement from the international gymnastic team but would still compete at college level in America[37] for Louisiana State University.